Optical transmission system with wavelength multiplexing

摘要

The information network has an optical link (L) and a multiplexers (&thetas; i) for transferring messages (Mi,Mj) between nodes (Ni,Nj) which comprises a sub-unit of the network. The messages are contained in defined time intervals by a clock signal (SP) and each node has an input (Ei) connected to the link for receiving messages by detection of at least one specific signal wavelength. Each node has an output connected to the link to allow emission of messages which are wavelength modulated. The network is characterised by each node for which provision is made to carry messages to be output at a specific wavelength and have associated with them respective tags (Dij) for identifying the destination nodes for the message. The network controller is connected to the link and is conditioned to receive messages and tags emitted by each node and to re-emit or transmit the received messages towards the input of the destination node. The retransmitted messages are output at a wavelength corresp. to the reception wavelength of the destination node identified by the tag. Each node has a different reception wavelength.